He said: “Whilst we know that Alan was last seen about 0910 hrs on Monday morning having taken a taxi from Woodlands View Hospital in Irvine to Kilwinning train station, we don’t know where he was intending to go.

“We know that he frequents the Glasgow Film Theatre, in Rose Street, Glasgow and enquiries are being carried out in Glasgow city centre.

“I would ask that anyone who knows where Alan is or who has seen someone fitting his description contact Irvine Police Office through the 101 number.

“I would also ask Alan himself to contact police to let us know he is safe and well. His family are very concerned about him and want him to come home.”